WO2022000743A1

WO2022000743A1 - Method and apparatus for controlling power of wind farm

Info

Publication number: WO2022000743A1
Application number: PCT/CN2020/111659
Authority: WO
Inventors: 于迟; 肖硕文; 王泽林
Original assignee: 新疆金风科技股份有限公司
Priority date: 2020-06-28
Filing date: 2020-08-27
Publication date: 2022-01-06
Also published as: CA3177694A1; BR112022024998A2; AU2020456769A1; EP4131705A1; CL2022003495A1; US20230198263A1; CN113852131A; EP4131705A4

Abstract

Provided are a method and apparatus for controlling the power of a wind farm. The method for controlling the power of a wind farm comprises: in response to receiving a whole-farm active adjustment signal that is sent by a power grid for a wind farm, calculating an adjustable power range of each wind turbine generator set according to the current power output state of each wind turbine generator set in the wind farm; and on the basis of the adjustable power range of each wind turbine generator set and a whole-farm target power indicated by the whole-farm active adjustment signal, calculating a power to be distributed to each wind turbine generator set, so as to generate an active power regulation instruction, and issuing the generated active power regulation instruction to each wind turbine generator set.

Description

Power control method and device for wind farm

technical field

The present disclosure relates to the technical field of wind power generation. More particularly, the present disclosure relates to a power control method and apparatus for a wind farm.

Background technique

Due to the grid connection requirements of the wind farm, the wind farm will accept the grid command to control the output active power. This requires that the wind turbine can adjust its active power in real time according to the demand.

The tower height of the flexible tower type wind turbine is high, so that better wind energy can be obtained, but at the same time, the natural frequency of the tower is low. If the sweep frequency of the wind turbine blades is close to the natural frequency of the tower, it will cause resonance problems, thus affecting the safety of the wind turbine. It is possible to increase the tower frequency by increasing the diameter or wall thickness of the tower to avoid the resonance point, but this will obviously increase the cost, so optimizing the tower cannot solve the resonance problem in principle, only through proper control Strategy to avoid the wind turbine running at the resonance speed point is the only feasible method.

Therefore, it is necessary to avoid the wind turbine running in the sensitive speed range for a long time, such as the torque-speed curve of the wind turbine shown in Figure 1. Assuming that between the speed point A and the speed point B is the sensitive speed range, the wind turbine implements the skip speed strategy under this working condition to avoid the wind turbine running between A and B for a long time.

When the power grid controls the power of the wind farm including the flexible tower wind turbine through the energy platform, it is inevitable to adjust the power of the flexible tower wind turbine, and then control the speed. If the wind turbine power limit command issued by the energy platform is close to the jump speed range, or repeatedly crosses the jump speed range, it may affect the operation safety of the wind turbine.

SUMMARY OF THE INVENTION

An exemplary embodiment of the present disclosure is to provide a power control method and device for a wind farm, so as to propose a power limiting strategy for a flexible tower wind farm from two perspectives of single-machine control and farm-level control. On the one hand, it reduces the frequent skipping speed or shutdown of wind turbines caused by unreasonable allocation of field-level strategies.

According to an exemplary embodiment of the present disclosure, there is provided a power control method for a wind farm, executed by a power control device of the wind farm, comprising: in response to receiving a full-field active power adjustment signal for the wind farm sent by a power grid, according to the wind farm Calculate the power adjustable range of each wind turbine based on the current output state of each wind turbine in , so as to generate active power regulation commands and send the generated active power regulation commands to each wind turbine.

According to an exemplary embodiment of the present disclosure, there is provided a power control method for a wind farm, which is executed by a wind turbine, including: receiving an active power control instruction issued by a power control device of the wind farm; and the current real-time power of the wind turbine to perform a skip speed operation.

According to an exemplary embodiment of the present disclosure, there is provided a power control apparatus for a wind farm, including: a range calculation unit configured to, in response to receiving a field-wide active power adjustment signal for the wind farm sent by the power grid, according to various parameters in the wind farm The current output state of the wind turbines calculates the power adjustable range of each wind turbine; and a power calculation unit configured to calculate the power to each wind turbine based on the power adjustable range of each wind turbine and the overall target power indicated by the overall active power adjustment signal. The power allocated by the wind turbines to generate active power control commands and send the generated active power control commands to each wind turbine.

According to an exemplary embodiment of the present disclosure, there is provided a wind turbine of a wind farm, comprising: an instruction receiving unit configured to receive an active power regulation instruction issued by a power control device of the wind farm; a skip speed unit configured to be based on The skip speed operation is performed based on the skip speed power, the active power regulation command and the current real-time power of the wind turbine.

According to an exemplary embodiment of the present disclosure, a wind farm is provided, comprising a power control device configured to: in response to receiving a field-wide active power adjustment signal for the wind farm sent by a power grid, according to the current status of each wind turbine in the wind farm The power output state calculates the power adjustable range of each wind turbine; and calculates the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the full-scale target power indicated by the full-scale active power regulation signal to generate active power regulation. command, and send the generated active power control command to each wind turbine.

According to an exemplary embodiment of the present disclosure, a wind farm is provided, comprising at least one wind turbine, each of the at least one wind turbine is configured to: receive an active power regulation instruction issued by a power control device of the wind farm ; Execute the skip speed operation based on the skip speed power, the active power regulation command and the current real-time power of the wind turbine.

According to an exemplary embodiment of the present disclosure, a wind farm is provided, including a farm-side command issuing device and at least one wind turbine. Wherein, the field-side instruction issuing device includes an instruction receiving unit, a power distribution unit and a communication unit. The instruction receiving unit is configured to receive the full-field active power adjustment signal sent by the power grid system for the wind farm; the power distribution unit is configured as In response to the command receiving unit receiving the full-field active power adjustment signal for the wind farm sent by the power grid, calculate the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm, and adjust the power based on the power of each wind turbine. The power distribution is performed according to the range and the whole-field target power indicated by the whole-field active power adjustment signal; the communication unit is configured to issue the power distribution result of the power distribution unit to each wind turbine. Wherein, each wind turbine in the at least one wind turbine includes a fan control unit, which is configured to execute based on the jump speed power, the power distribution result issued by the field-side command issuing device, and the current real-time power of the wind turbine. Jump speed operation.

According to an exemplary embodiment of the present disclosure, there is provided a main controller of a wind turbine, comprising: a processor; a memory storing a computer program, when the computer program is executed by the processor, the exemplary implementation according to the present disclosure is realized Example of a power control method for a wind farm.

According to an exemplary embodiment of the present disclosure, there is provided a power control system for a wind farm, including a power grid system and any one of the above-mentioned wind farms.

According to an exemplary embodiment of the present disclosure, a power control system for a wind farm is provided, including a power control device and a wind turbine, on which a main controller is installed, the power control device and the main control of the wind turbine device communication connection.

According to an exemplary embodiment of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, realizes power of a wind farm according to an exemplary embodiment of the present disclosure Control Method.

According to an exemplary embodiment of the present disclosure, there is provided a computing device, comprising: a processor; and a memory storing a computer program that, when executed by the processor, implements a wind farm according to an exemplary embodiment of the present disclosure method of power control. According to the wind farm, the power control system for the wind farm, the power control method and the device for the wind farm according to the exemplary embodiments of the present disclosure, in response to receiving the full-field active power adjustment signal for the wind farm sent by the power grid, according to the wind farm Calculate the power adjustable range of each wind turbine based on the current output state of each wind turbine in , in order to generate active power control commands and send the generated active power control commands to each wind turbine, so as to (1) realize the control function of the flexible tower wind farm responding to the active power dispatching of the full power section of the grid; (2) effectively protect the flexible tower wind power The safety of the unit when the speed is skipped, avoiding the adjustment strategy of the field-side equipment that causes the wind turbine to repeatedly perform the skipping-speed action when it does not return to the normal state, thus causing potential safety hazards; (3) Avoid being damaged by the field side due to the protection of the flexible tower speed. The equipment issues a shutdown command, resulting in a slow start-up speed when the power is increased, and the problem that the power grid assessment index cannot be met. In addition, the fans can be divided into N groups. When the power adjustment range is large, a single group or a small number of groups can perform the skipping speed action, which can reduce the accuracy error of the active power output caused by the large power fluctuation during the skipping speed process from the perspective of the whole field. Influence.

Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the ensuing description, and in part will be apparent from the description, or may be learned by practice of the present general inventive concept.

Description of drawings

The above and other objects and features of exemplary embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings that exemplarily illustrate embodiments, wherein:

Figure 1 shows the torque-speed curve of the unit;

2 shows a schematic diagram of a power control system for a wind farm according to an exemplary embodiment of the present disclosure;

FIG. 3 shows a flowchart of a power control method of a wind farm according to an exemplary embodiment of the present disclosure;

FIG. 4 shows a flowchart of a power control method of a wind farm according to an exemplary embodiment of the present disclosure;

5 shows a block diagram of a power control apparatus of a wind farm according to an exemplary embodiment of the present disclosure;

FIG. 6 shows a block diagram of a wind turbine of a wind farm according to an exemplary embodiment of the present disclosure; and

7 shows a schematic diagram of a computing device according to an exemplary embodiment of the present disclosure.

detailed description

Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present disclosure by referring to the figures.

According to the corresponding relationship between the speed and the power, the wind turbine calculates the power corresponding to the resonance speed, and adds a threshold to obtain the lower limit of the available power. The energy platform shall not be allocated to the flexible tower wind turbine with a power limit value less than the lower limit of the available power, but a shutdown command can be issued. In this way, when adjusting the overall power, only a limited range of power is limited for the flexible tower wind turbines. When the overall active power is still greater than the target power required by the grid, some wind turbines will be skipped or stopped.

For example, Guodian United Power: According to the real-time speed and torque value of each wind turbine, the operating state of each wind turbine is judged, and then according to the judgment result, the wind turbines in the Roupa Wind Farm are divided into non-adjustable active power wind turbines and adjustable active power wind turbines. The power of wind turbines, and the precise energy regulation of the wind turbines with adjustable active power in the Routa wind farm is carried out through the energy dispatch control method. The energy dispatching system includes a wind turbine operating state judgment module and an energy dispatching control module. Only when the power adjustable margin of the non-jumping speed of each wind turbine is insufficient, the speed-jumping action of some wind turbines is started.

The skip speed is to prevent the wind turbine from running in a specific speed range (speed forbidden area) for a long time, and to take into account the tower vibration that is easily caused when the wind turbine passes through the resonance range, so as to prevent the wind turbine from switching back and forth in the forbidden speed area. .

2 shows a schematic diagram of a power control system for a wind farm according to an exemplary embodiment of the present disclosure.

In FIG. 2 , the active power control system 200 consists of three parts: a power grid system 21 , a field-side command issuing device 22 and at least one wind turbine (wind turbine 1 to wind turbine N). Here, the farm-side command issuing device 22 and at least one wind turbine (wind turbine 1 to wind turbine N) may form a wind farm.

In an exemplary embodiment of the present disclosure, the power grid system 21 includes a power dispatching unit 211 of the power grid for sending a field-wide active power regulation signal to the wind farm.

In an exemplary embodiment of the present disclosure, the field-side instruction issuing device 22 includes an instruction receiving unit 221 , a power distribution unit 222 and a communication unit 223 . The instruction receiving unit 221 is configured to: receive the full-field active power adjustment signal for the wind farm sent by the power grid system. The power distribution unit 222 is configured to: in response to the command receiving unit receiving the full-field active power adjustment signal for the wind farm sent by the power grid, calculate the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm, The power distribution is performed based on the power adjustable range of each wind turbine and the overall target power indicated by the overall active power adjustment signal. The communication unit 223 is configured to: deliver the power distribution result of the power distribution unit to each wind turbine group.

In an exemplary embodiment of the present disclosure, the power distribution unit 222 may be configured to calculate the power adjustable range of each wind turbine according to the currently available maximum power, the currently available minimum power and the current power of each wind turbine.

In an exemplary embodiment of the present disclosure, the power distribution unit 222 may also be configured to perform the following step for each wind turbine: calculating the difference between the currently available maximum power of the wind turbine and the current power as the maximum power-up adjustment of the wind turbine value; calculate the difference between the currently available minimum power of the wind turbine and the current power as the maximum power reduction adjustment value of the wind turbine. Here, the power adjustable range of the wind turbine includes the maximum power-up adjustment value and the maximum power-down adjustment value of the wind turbine. That is to say, the adjustable power range of the wind turbine can include the adjustable range of the maximum power increase and the adjustable range of the maximum power reduction; and the maximum derating adjustment value is limited.

In an exemplary embodiment of the present disclosure, the power distribution unit 222 may be configured to: group each wind turbine in the wind farm based on the total capacity of the wind farm; Power adjustable range; power distribution is performed based on the power adjustable range of each group of wind turbines and the target power of the entire field. For example, the number of wind turbines included in no more than 5% of the total capacity of the wind farm can be a group. For example, a wind farm with a capacity of 100MW can be a group of 5MW, and a group of 2 wind turbines for a 2.5MW wind turbine. , for 2.0MW wind turbines, it is a group of 2 wind turbines, and for 1.5MW wind turbines, it is a group of 3 wind turbines. A group of at least 1 wind turbine.

In an exemplary embodiment of the present disclosure, the power distribution unit 222 may be further configured to obtain the power adjustable range of each group of wind turbines by superimposing the power adjustable ranges of each wind turbine in each group of wind turbines .

In an exemplary embodiment of the present disclosure, the power distribution unit 222 may be further configured to: calculate the difference between the target power of the whole field and the real-time power of the whole field as the power adjustment range; The ratio or difference between the maximum power-up adjustment value or the maximum power-down adjustment value and the power adjustment range is obtained to obtain the closeness between the power adjustment range and the power adjustment range of each group of wind turbines; at least one group of wind turbines is determined according to the proximity For the wind turbines to be adjusted for power; for each wind turbine determined to be adjusted for power, take the maximum power-up adjustment value or the maximum power-down adjustment value in the power adjustable range as the value of the power allocated to it.

For example, when power reduction is required, by calculating the difference between the maximum power reduction adjustment value of each group of wind turbines and the power adjustment range, the closeness between the power adjustment range and the power adjustment range of each group of wind turbines is obtained. The group of wind turbines with the greatest proximity in 90% of the groups is determined as the wind turbine to perform power adjustment; for each wind turbine in the group of wind turbines with the greatest proximity, the maximum power reduction in the power adjustable range is set. The adjustment value is the value of the power allocated to it. For example, when the power needs to be increased, by calculating the difference between the maximum power increase adjustment value and the power adjustment range of each group of wind turbines, the closeness of the power adjustable range and the power adjustment range of each group of wind turbines is obtained. The group of wind turbines with the greatest proximity in 90% of the groups is determined as the wind turbine to perform power adjustment; for each wind turbine in the group of wind turbines with the greatest proximity, the maximum liter power in its power adjustable range is determined. The adjustment value is the value of the power allocated to it.

For example, when the closeness of the power adjustable range and power adjustment range of each group of wind turbines does not exceed 90%, the total closeness of the total power adjustable range and power adjustment range of 2 or more groups can be calculated. The manner in which 2 or more groups of wind turbines are determined as wind turbines to perform power adjustment according to the total proximity and the way of allocating power to each wind turbine to be performed power adjustment is similar to the above-mentioned group of wind turbines, here No longer.

Specifically, the field-side command issuing device is a control system located inside the wind farm, and cooperates with multiple wind turbines in the wind farm to jointly realize the function of active power regulation. The function of the device is to receive the full-field active power regulation signal sent by the power grid, distribute the power according to the state of the wind turbine, and issue a reasonable active power regulation command to each wind turbine in the wind farm. The command receiving unit 221 of the field-side command issuing device is configured to receive the full-field active power adjustment target sent by the grid active power dispatching unit. The power distribution unit 222 of the field-side command issuing device is used to calculate the power target allocated by each wind turbine according to the current state of the wind turbine, so that the overall active power output of the wind farm meets the field-wide target value issued by the grid. The allocation basis needs to be combined with the current power of the wind turbine, the upper limit of available power, and the lower limit of available power. These signals are uploaded from the wind turbine.

The power distribution unit 222 may divide the wind farm units including multiple flexible towers into N groups, and when performing power reduction or power up, preferentially perform power limiting operation on one or a few groups. The real-time adjustable range of each group of fans can be calculated according to the available maximum power, available minimum power and current power uploaded by the fans. Here, the maximum power-up adjustment value of the fans in group X: ∑X(Pmax-Pr), and the maximum power-down adjustment value of the fans in group X: ∑X(Pr-Pmin). Priority is given to the action of wind turbines with an adjustable range close to the adjustment range △. Here, the power limit operation means that after the wind turbine receives a power limit command including target power and maintenance time information, it reduces the power output of the wind turbine through control actions such as pitch, torque, and rotational speed, so that the power is maintained at Near the target power until the command changes or the energy platform cancels the power limit command.

The communication unit 223 of the field-side instruction issuing device is used for issuing the calculation result of the power distribution unit to each controlled wind turbine. The communication with the fan can adopt communication methods such as profinet and OPC-UA, but the communication period should not be greater than 10s to avoid the adverse effects caused by the system delay.

In the exemplary embodiment of the present disclosure, each wind turbine in the at least one wind turbine includes a wind turbine control unit 231, which is configured to be based on the jump speed power, the power distribution result issued by the field-side command issuing device, and The current real-time power of the wind turbine performs a skip speed operation.

In an exemplary embodiment of the present disclosure, the wind turbine control unit 231 may be configured to: when the trip speed power is smaller than the larger value among the single-machine target power of the wind turbine and the current real-time power and greater than the wind turbine When the value of the single machine target power and the current real-time power is the smaller value, the jump speed operation is performed; when the jump speed power is less than the smaller value of the single machine target power of the wind turbine and the current real-time power or greater than the wind power When the single target power of the unit and the current real-time power is the larger value, the skip speed operation will not be performed.

In an exemplary embodiment of the present disclosure, the wind turbine control unit 231 may be further configured to: when the trip speed power is smaller than the larger value among the single target power of the wind turbine and the current real-time power and greater than the wind turbine When the smaller value of the single machine target power and the current real-time power is the smaller of the current real-time power, according to the magnitude relationship between the current real-time power and the skip speed power, the current availability of the wind turbine during the preset waiting period is adjusted based on the skip speed power. Maximum power or currently available minimum power.

In an exemplary embodiment of the present disclosure, the wind turbine control unit 231 may be further configured to: when the current real-time power is greater than the jump speed power and less than the single-machine target power of the wind turbine, set the wind turbine in a preset The currently available maximum power during the waiting period is adjusted to the jump speed power; when the current real-time power is less than the jump speed power and greater than the single-machine target power of the wind turbine, the current available minimum power of the wind turbine during the preset waiting period is set. Power is adjusted to jump speed power.

Specifically, on the one hand, the fan control unit 231 receives signals from the field-side command issuing device and performs power control of the wind turbine, and on the other hand, uploads the wind turbine status signal to the field-side command issuing device. The signals that need to be uploaded include: the currently available maximum power of the wind turbine, the currently available minimum power of the wind turbine, and the current power of the wind turbine.

During normal operation, the wind turbine uses the maximum power at the current wind speed (obtained from the power curve look-up table) as the upper limit of power available Pmax, and the default minimum power limit value of the wind turbine during normal operation (determined by factors such as component temperature status, wind speed, etc.) ) is the available lower limit Pmin. When the power target value Pset of the single machine issued by the field-side command issuing device and the current real-time power Pr are both above or below the jump speed power Pj, the wind turbine does not need to perform the jump speed and operates normally. And when the power target value Pset is different from the current real-time power Pr and is smaller than or larger than Pj at the same time, the wind turbine needs to perform the skip speed action. After each execution of the skip speed action, it is necessary to wait for the vibration acceleration of the wind turbine to return to the normal range before allowing the next skip speed. The upper or lower limit of the available power during this waiting period is adjusted to Pj, so as to prevent the field-side command issuing device from triggering the power-limited jumping speed during this period.

In other exemplary embodiments of the present disclosure, the wind farm includes a power control device, and the power control device is configured to: in response to receiving a field-wide active power adjustment signal for the wind farm sent by the power grid, according to the power of each wind turbine in the wind farm Calculate the power adjustable range of each wind turbine based on the current output state; and calculate the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the overall target power indicated by the overall active power adjustment signal to generate active power. Control instructions, and send the generated active power control instructions to each wind turbine.

In other exemplary embodiments of the present disclosure, the wind farm includes at least one wind turbine, and each of the at least one wind turbine is configured to: receive an active power regulation instruction issued by a power control device of the wind farm; based on The skip speed operation is performed based on the skip speed power, the active power regulation command and the current real-time power of the wind turbine.

In other exemplary embodiments of the present disclosure, a power control system for a wind farm includes a power control device having a main controller mounted thereon and a wind turbine, the power control device being in communication with the main controller of the wind turbine connect.

In other exemplary embodiments of the present disclosure, the power control device may be located inside or outside the wind farm, which is not limited by the present disclosure.

FIG. 3 shows a flowchart of a power control method of a wind farm according to an exemplary embodiment of the present disclosure. It may be performed by a power control system of a wind farm, a power control device, or the like.

Referring to FIG. 3 , in step S301 , in response to receiving the full-field active power adjustment signal for the wind farm sent by the power grid, the power adjustable range of each wind turbine is calculated according to the current output state of each wind turbine in the wind farm.

In an exemplary embodiment of the present disclosure, when calculating the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm, the currently available maximum power, the currently available minimum power and the The current power calculates the power adjustable range of each wind turbine.

In an exemplary embodiment of the present disclosure, when calculating the power adjustable range of each wind turbine according to the currently available maximum power, currently available minimum power and current power of each wind turbine, the following steps may be performed for each wind turbine: calculating The difference between the currently available maximum power of the wind turbine and the current power is used as the maximum power increase adjustment value of the wind turbine; the difference between the currently available minimum power and the current power of the wind turbine is calculated as the maximum power reduction adjustment value of the wind turbine. Here, the power adjustable range of the wind turbine includes the maximum power-up adjustment value and the maximum power-down adjustment value of the wind turbine. That is to say, the adjustable power range of the wind turbine can include the adjustable range of the maximum power increase and the adjustable range of the maximum power reduction; and the maximum derating adjustment value is limited.

In step S302, the power allocated to each wind turbine is calculated based on the power adjustable range of each wind turbine and the full-scale target power indicated by the full-scale active power regulation signal, so as to generate an active power regulation command, and generate an output to each wind turbine. active power control command.

In an exemplary embodiment of the present disclosure, when calculating the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the full-scale target power indicated by the full-scale active power regulation signal, the total capacity of the wind farm may be first based on the total capacity of the wind farm. Group the wind turbines in the wind farm, and then calculate the power adjustable range of each group of wind turbines according to the power adjustable range of each wind turbine, and calculate the direction based on the power adjustable range of each group of wind turbines and the overall target power. The power allocated by each wind turbine.

In an exemplary embodiment of the present disclosure, when calculating the power adjustable range of each group of wind turbines according to the power adjustable range of each wind turbine, the power adjustable range of each wind turbine in each group can be calculated by Superposition is performed to obtain the power adjustable range of each group of wind turbines.

In an exemplary embodiment of the present disclosure, when calculating the power allocated to each wind turbine based on the power adjustable range of each group of wind turbines and the overall target power, the difference between the overall target power and the overall real-time power may be calculated first. The power adjustment range of each group of wind turbines is obtained by calculating the ratio or difference between the maximum power-up adjustment value or the maximum power-down adjustment value and the power adjustment range in the power adjustment range of each group of wind turbines. Proximity to the power adjustment range, then at least one group of wind turbines is determined as the wind turbines to be subjected to power adjustment according to the proximity, and for each wind turbine determined to be subjected to power adjustment, the power adjustment range of the wind turbines is determined. The maximum power-up adjustment value or the maximum power-down adjustment value is taken as the value of the power allocated to it.

FIG. 4 shows a flowchart of a power control method of a wind farm according to an exemplary embodiment of the present disclosure.

Referring to FIG. 4 , in step S401, an active power regulation command issued by a power control device of a wind farm is received.

In step S402, the skip speed operation is performed based on the skip speed power, the active power regulation command and the current real-time power of the wind turbine.

In an exemplary embodiment of the present disclosure, when the skip speed operation is performed based on the skip speed power, the active power regulation command, and the current real-time power of the wind turbine, when the skip speed power is smaller than the single unit of the wind turbine When the larger value of the target power and the current real-time power is greater than the smaller value of the single-machine target power of the wind turbine and the current real-time power, the skip speed operation is performed; when the skip speed power is smaller than the wind turbine When the smaller value of the single-machine target power of the wind turbine generator and the current real-time power is greater than the larger value of the single-machine target power and the current real-time power of the wind turbine, the skip speed operation is not performed.

In an exemplary embodiment of the present disclosure, when the jump speed power is smaller than the larger value among the single-machine target power and the current real-time power of the wind turbine and is greater than the single-machine target power and the current real-time power of the wind turbine It is also possible to adjust the currently available maximum power or currently available minimum power of the wind turbine during the preset waiting period based on the magnitude relationship between the current real-time power and the skip speed power.

In an exemplary embodiment of the present disclosure, when the currently available maximum power or currently available minimum power of the wind turbine during a preset waiting period is adjusted based on the skip speed power, the current real-time power may be greater than the skip speed power and When it is less than the single-machine target power of the wind turbine, adjust the currently available maximum power of the wind turbine during the preset waiting period to the jump speed power; when the current real-time power is less than the jump speed power and greater than the wind turbine When the target power of a single machine is set, the currently available minimum power of the wind turbine during the preset waiting period is adjusted to the skip speed power.

The wind farm, the power control system for the wind farm, and the power control method for the wind farm according to the exemplary embodiments of the present disclosure have been described above with reference to FIGS. 2 to 4 . Hereinafter, a power control apparatus of a wind farm and a unit thereof according to an exemplary embodiment of the present disclosure will be described with reference to FIGS. 5 and 6 .

FIG. 5 shows a block diagram of a power control apparatus of a wind farm according to an exemplary embodiment of the present disclosure.

Referring to FIG. 5 , the power control apparatus of the wind farm includes a range calculation unit 51 and a power calculation unit 52 .

The range calculation unit 51 is configured to calculate the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm in response to receiving the full-field active power adjustment signal for the wind farm sent by the power grid.

In an exemplary embodiment of the present disclosure, the range calculation unit 51 may be configured to calculate the power adjustable range of each wind turbine according to the currently available maximum power, the currently available minimum power and the current power of each wind turbine.

In an exemplary embodiment of the present disclosure, the range calculation unit 51 may be further configured to perform the following step for each wind turbine: calculating the difference between the currently available maximum power of the wind turbine and the current power as the maximum power-up adjustment of the wind turbine Calculate the difference between the currently available minimum power of the wind turbine and the current power as the maximum power reduction adjustment value of the wind turbine, wherein the power adjustable range of the wind turbine includes the maximum power increase adjustment value and the maximum power reduction adjustment value of the wind turbine .

The power calculation unit 52 is configured to calculate the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the full-scale target power indicated by the full-scale active power regulation signal, so as to generate an active power regulation command and send it to each wind turbine. Generated active power regulation commands.

In an exemplary embodiment of the present disclosure, the power calculation unit 52 may be configured to: group each wind turbine in the wind farm based on the total capacity of the wind farm; Power adjustable range: Calculate the power allocated to each wind turbine based on the power adjustable range of each group of wind turbines and the overall target power.

In an exemplary embodiment of the present disclosure, the power calculation unit 52 may be further configured to obtain the power adjustable range of each group of wind turbines by superimposing the power adjustable ranges of each wind turbine in each group of wind turbines .

In an exemplary embodiment of the present disclosure, the power calculation unit 52 may be further configured to: calculate the difference between the full-field target power and the full-field real-time power as the power adjustment range; The ratio or difference between the maximum power-up adjustment value or the maximum power-down adjustment value and the power adjustment range is obtained to obtain the closeness between the power adjustment range and the power adjustment range of each group of wind turbines; at least one group of wind turbines is determined according to the proximity For the wind turbines to be adjusted for power; for each wind turbine determined to be adjusted for power, take the maximum power-up adjustment value or the maximum power-down adjustment value in the power adjustable range as the value of the power allocated to it.

Figure 6 shows a block diagram of a wind turbine of a wind farm according to an exemplary embodiment of the present disclosure.

Referring to FIG. 6 , the wind turbine of the wind farm includes an instruction receiving unit 61 and a jumping speed unit 62 .

The instruction receiving unit 61 is configured to receive an active power regulation instruction issued by the power control device of the wind farm.

The skip speed unit 62 is configured to perform a skip speed operation based on the skip speed power, the active power regulation command and the current real-time power of the wind turbine.

In an exemplary embodiment of the present disclosure, the skip speed unit 62 may be configured to: when the skip speed power is smaller than the larger value among the single target power of the wind turbine and the current real-time power and greater than the wind turbine When the smaller value of the single machine target power of the wind turbine and the current real-time power, the jump speed operation is performed; when the jump speed power is less than the smaller value of the single machine target power of the wind turbine and the current real-time power or greater than the When the single target power of the wind turbine is larger than the current real-time power, the skip speed operation is not performed.

In an exemplary embodiment of the present disclosure, it may further include: an available power adjustment unit (not shown), configured to, when the jump speed power is smaller than the larger one of the single-machine target power and the current real-time power of the wind turbine, When the value is greater than the smaller value of the single target power of the wind turbine and the current real-time power, according to the magnitude relationship between the current real-time power and the skip speed power, the wind turbine is adjusted based on the skip speed power in the pre- The currently available maximum power or the currently available minimum power during the set waiting period.

In an exemplary embodiment of the present disclosure, the available power adjustment unit may be configured to: when the current real-time power is greater than the jump speed power and less than the single-machine target power of the wind turbine, place the wind turbine in a preset waiting time The currently available maximum power during the period is adjusted to the jump speed power; when the current real-time power is less than the jump speed power and greater than the single-machine target power of the wind turbine, the currently available minimum power of the wind turbine during the preset waiting period is used. Adjust to jump speed power.

In addition, according to an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium on which a computer program is stored, and when the computer program is executed, realizes the operation of the wind farm according to the exemplary embodiment of the present disclosure. power control method.

In an exemplary embodiment of the present disclosure, the computer-readable storage medium may carry one or more programs, which, when executed, may implement the following steps: in response to receiving a message sent by the power grid for the wind farm The full-field active power regulation signal calculates the power adjustable range of each wind turbine based on the current output state of each wind turbine in the wind farm; and based on the power adjustable range of each wind turbine and the full-field target indicated by the full-scale active power regulation signal The power calculates the power allocated to each wind turbine to generate an active power regulation command and send the generated active power regulation command to each wind turbine.

In an exemplary embodiment of the present disclosure, the computer-readable storage medium may carry one or more programs, and when the computer program is executed, the following steps may be implemented: receiving active power from a power control device of a wind farm A regulation command; a jump speed operation is performed based on the jump speed power, the active power regulation command and the current real-time power of the wind turbine.

The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples of computer readable storage media may include, but are not limited to, electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable Programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In embodiments of the present disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a computer program that can be used by or in conjunction with an instruction execution system, apparatus, or device. A computer program embodied on a computer-readable storage medium may be transmitted using any suitable medium including, but not limited to, electrical wire, optical fiber cable, RF (radio frequency), etc., or any suitable combination of the foregoing. The computer-readable storage medium may be included in any apparatus; it may also exist alone without being incorporated into the apparatus.

The power control apparatus of the wind farm according to the exemplary embodiment of the present disclosure has been described above with reference to FIGS. 5 to 6 . Next, a computing device according to an exemplary embodiment of the present disclosure will be described with reference to FIG. 7 .

Referring to FIG. 7 , a computing device 7 according to an exemplary embodiment of the present disclosure includes a memory 71 and a processor 72 , the memory 71 stores a computer program, and when the computer program is executed by the processor 72 , realizes Power control methods for wind farms of the disclosed exemplary embodiments.

In an exemplary embodiment of the present disclosure, when the computer program is executed by the processor 72, the following steps may be implemented: in response to receiving the full-field active power adjustment signal for the wind farm sent by the power grid, according to each wind power in the wind farm The current output state of the unit calculates the power adjustable range of each wind turbine; and calculates the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the overall target power indicated by the overall active power adjustment signal to generate The active power control command is sent to the active power control command generated by each wind turbine.

In an exemplary embodiment of the present disclosure, when the computer program is executed by the processor 72, the following steps may be implemented: receiving an active power regulation instruction issued by a power control device of a wind farm; The command and the current real-time power of the wind turbine perform a skip speed operation.

The computing device shown in FIG. 7 is only an example, and should not impose any limitation on the function and scope of use of the embodiments of the present disclosure.

In other exemplary embodiments of the present disclosure, the main controller of the wind turbine may include a processor and a memory. The memory stores a computer program, and when the computer program is executed by the processor, the following steps can be implemented: receiving an active power control instruction issued by a power control device of a wind farm; The current real-time power of the unit performs the skip speed operation.

The wind farm, the power control system for the wind farm, the power control method and the apparatus for the wind farm according to the exemplary embodiments of the present disclosure have been described above with reference to FIGS. 2 to 7 . However, it should be understood that the power control device of the wind farm shown in Figures 5 to 6 and its units, respectively, may be configured as software, hardware, firmware or any combination of the above to perform a specific function, as shown in Figure 7 The illustrated computing device is not limited to including the components shown above, but some components may be added or deleted as required, and the above components may also be combined.

According to the wind farm, the power control system for the wind farm, the power control method and the device for the wind farm according to the exemplary embodiments of the present disclosure, by responding to receiving the full-field active power adjustment signal for the wind farm sent by the power grid, according to the wind farm Calculate the power adjustable range of each wind turbine based on the current output state of each wind turbine in , in order to generate active power control commands and send the generated active power control commands to each wind turbine, so as to (1) realize the control function of the flexible tower wind farm in response to the active power dispatching of the full power section of the grid; (2) effectively protect the flexible tower wind power The safety of the unit when the speed is skipped, and the adjustment strategy of the equipment on the field side makes the wind turbine repeatedly perform the skipping speed action when it does not return to the normal state, thus causing potential safety hazards; (3) To avoid being damaged by the field side due to the protection of the flexible tower speed The equipment issues a shutdown command, which results in a slow start-up speed when the power is increased and cannot meet the grid assessment indicators. In addition, the fans can be divided into N groups. When the power adjustment range is large, a single group or a small number of groups can perform the skipping speed action, which can reduce the accuracy error of the active power output due to the large power fluctuation during the skipping speed process from the perspective of the whole field. Influence.

Although the present disclosure has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that form and detail may be made therein without departing from the spirit and scope of the present disclosure as defined by the following claims various changes on.

Claims

A power control method of a wind farm, executed by a power control device of a wind farm, characterized in that the power control method comprises:

In response to receiving the full-field active power adjustment signal sent by the power grid for the wind farm, calculate the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm;

Calculate the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the overall target power indicated by the overall active power regulation signal, so as to generate active power regulation commands and control the active power generated under each wind turbine. instruction.
The power control method according to claim 1, wherein the step of calculating the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm comprises:

Perform the following steps for each wind turbine:

Calculate the difference between the currently available maximum power of the wind turbine and the current power as the maximum power-up adjustment value of the wind turbine;

Calculate the difference between the currently available minimum power of the wind turbine and the current power as the maximum power reduction adjustment value of the wind turbine,

Wherein, the power adjustable range of the wind turbine includes: the maximum power-up adjustment value and the maximum power-down adjustment value of the wind turbine.
The power control method according to claim 1, wherein the step of calculating the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the full-scale target power indicated by the full-scale active power adjustment signal comprises:

Group the wind turbines in the wind farm based on the total wind farm capacity;

Calculate the power adjustable range of each group of wind turbines according to the power adjustable range of each wind turbine;

The power allocated to each wind turbine is calculated based on the power adjustable range of each group of wind turbines and the overall target power.
The power control method according to claim 3, wherein the step of calculating the power allocated to each wind turbine based on the power adjustable range of each group of wind turbines and the target power of the entire field comprises:

Calculate the difference between the full-field target power and the full-field real-time power as the power adjustment range;

By calculating the maximum power increase adjustment value in the power adjustable range of each group of wind turbines, or the ratio or difference between the maximum power reduction adjustment value and the power adjustment range, the difference between the power adjustable range and power adjustment range of each group of wind turbines is obtained. proximity;

Determining at least one group of wind turbines as the wind turbines to perform power adjustment according to the proximity;

For each wind turbine determined to be subjected to power adjustment, the maximum power-up adjustment value or the maximum power-down adjustment value in its power adjustable range is taken as the value of the power allocated to it.
A power control method for a wind farm, executed by a wind turbine, includes:

receiving an active power regulation command issued by a power control device of a wind farm, wherein the active power regulation command is the active power regulation command described in any one of claims 1-4;

The skip speed operation is performed based on the skip speed power, the active power regulation command and the current real-time power of the wind turbine.
The power control method according to claim 5, wherein the step of performing the skip speed operation based on the skip speed power, the active power control command and the current real-time power of the wind turbine comprises:

When the jump speed power is smaller than the larger value among the single-machine target power of the wind turbine and the current real-time power and greater than the smaller value among the single-machine target power of the wind turbine and the current real-time power, the jump speed is executed. operate;

When the jump speed power is smaller than the smaller value among the single-machine target power of the wind turbine and the current real-time power or greater than the larger value among the single-machine target power of the wind turbine and the current real-time power, the jump is not performed. fast operation.
The power control method according to claim 6, further comprising:

When the jump speed power is smaller than the larger value among the single-machine target power of the wind turbine and the current real-time power and greater than the smaller value among the single-machine target power of the wind turbine and the current real-time power, according to the current real-time power and the magnitude relationship between the skip speed power, and based on the skip speed power, the currently available maximum power or the currently available minimum power of the wind turbine during the preset waiting period is adjusted.
The power control method according to claim 7, wherein the step of adjusting the currently available maximum power or the currently available minimum power of the wind turbine during a preset waiting period based on the skip speed power comprises:

When the current real-time power is greater than the skip speed power and less than the single-machine target power of the wind turbine, adjusting the currently available maximum power of the wind turbine during the preset waiting period to the skip speed power;

When the current real-time power is less than the skip speed power and greater than the single-machine target power of the wind turbine, the currently available minimum power of the wind turbine during the preset waiting period is adjusted to the skip speed power.
A power control device for a wind farm, comprising:

a range calculation unit, configured to, in response to receiving a field-wide active power adjustment signal sent by the power grid for the wind farm, calculate the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm; and

The power calculation unit is configured to calculate the power allocated to each wind turbine based on the power adjustable range of each wind turbine and the full-scale target power indicated by the full-scale active power regulation signal, so as to generate an active power regulation command and send it to each wind turbine. Generated active power regulation commands.
The power control device according to claim 9, wherein the range calculation unit is further configured to perform the following steps for each wind turbine:

Calculate the difference between the currently available maximum power of the wind turbine and the current power as the maximum power-up adjustment value of the wind turbine;

Calculate the difference between the currently available minimum power of the wind turbine and the current power as the maximum power reduction adjustment value of the wind turbine;

The power adjustable range of the wind turbine is composed of the maximum power-up adjustment value and the maximum power-down adjustment value of the wind turbine.
The power control device according to claim 9, wherein the power calculation unit is configured to:

Group the wind turbines in the wind farm based on the total wind farm capacity;

Calculate the power adjustable range of each group of wind turbines according to the power adjustable range of each wind turbine;

The power allocated to each wind turbine is calculated based on the power adjustable range of each group of wind turbines and the overall target power.
The power control device according to claim 11, wherein the power calculation unit is further configured to:

Calculate the difference between the full-field target power and the full-field real-time power as the power adjustment range;

By calculating the ratio or difference between the maximum power increase adjustment value or the maximum power reduction adjustment value and the power adjustment range in the power adjustable range of each group of wind turbines, the approximation between the power adjustable range and the power adjustment range of each group of wind turbines is obtained. Spend;

Determining at least one group of wind turbines as the wind turbines to perform power adjustment according to the proximity;

For each wind turbine determined to be subjected to power adjustment, the maximum power-up adjustment value or the maximum power-down adjustment value in its power adjustable range is taken as the value of the power allocated to it.
A main controller of a wind turbine, comprising:

processor;

The memory stores a computer program that, when executed by the processor, implements the power control method for a wind farm according to any one of claims 5 to 8.
A wind farm includes a field-side command issuing device and at least one wind turbine,

Wherein, the field-side instruction issuing device includes an instruction receiving unit, a power distribution unit and a communication unit,

The instruction receiving unit is configured to receive the full-field active power adjustment signal for the wind farm sent by the power grid system;

The power distribution unit is configured to, in response to the command receiving unit receiving the full-field active power regulation signal for the wind farm sent by the power grid, calculate the power adjustable range of each wind turbine according to the current output state of each wind turbine in the wind farm, and based on each wind farm. The power distribution range of the wind turbine and the target power of the whole field indicated by the whole field active power adjustment signal;

The communication unit is configured to send the power distribution result of the power distribution unit to each wind turbine,

Wherein, each wind turbine in the at least one wind turbine includes a fan control unit, and the fan control unit is configured to be based on the jump speed power, the power distribution result issued by the field-side command issuing device, and the current status of the wind turbine. Real-time power performs skip speed operations.
A power control system for a wind farm, comprising the power control device according to any one of claims 9-12 and the main controller of the wind turbine set according to claim 13, the power control device and the wind turbine set main controller communication connection.